Answer:

slag

Answer	Crossword Clue
SLAG	Dross
SLAG	Refinery leftover
SLAG	Smeltery residue

SLAG	Smelting refuse
SLAG	Smelter residue
SLAG	Tailings
SLAG	Blast furnace by-product
SLAG	Smeltery waste
SLAG	Diss, in the UK
SLAG	Smelting leftover
SLAG	Junk rock

SLAG	Smelting by-product
SLAG	Smelting byproduct
SLAG	Metallic waste
SLAG	Ore-refining residue
SLAG	Metal refuse
SLAG	Fused refuse
SLAG	Smeltery byproduct
SLAG	Foundry waste

SLAG	Refinery refuse
SLAG	Smelting waste
SLAG	Metal waste
SLAG	Smelter refuse
SLAG	Smeltery by-product
SLAG	Volcanic dross
SLAG	Refinery residue
SLAG	Smelter's waste

SLAG	Blast furnace refuse
SLAG	Metallic by-product
SLAG	Coal furnace waste
SLAG	Cinderlike lava
SLAG	Refinery dross
SLAG	Cinder
SLAG	Fused matter removed from ore
SLAG	Refuse in a steel mill

SLAG	Metal matter
SLAG	Smelting residue
SLAG	Furnace waste
SLAG	Refinery waste
SLAG	Smelt residue